Disk harrow



Get. 27, 1931. w. D. DEWEND DISK HARROW Filed March 25. 1929 i atented Oct. 27, 1931 it UNITED STATES PATENT OFFICE 1 WILL AMD. DEWEND, OF SOUTH BEND, INDIANA, ASSIGNQR ro OLIVER FARM EQUIP- ENT COMPANY, A CORPORATION or DELAWARE 25' "out'in the appended claims.

DISK HARROW A Application filed March 25, 1929. Serial No. 349,538.

The present invention is directed to a draft connection for tandem disk harrows in which thegangs of the disk harrow areangled by the draft of the tractor.

One of the objects of the present invention is to provide a novel and improved form of a draft connection for a tandem disk harrow 1n -which the movable draft member or clevis formingthe coupling connection between the harrow proper and thetractor, is held in parallel relation with the main draft member of i A further object of the invention is to provide a novel and improveddraft connect1on between the harrow and the tractorin which the member forming the connection therebetweeni'is prevented from buckling upon a backward movement of the tractor with respect to the harrow.- v

These and other objects are accomplished by providing a construction and an arrangement of the variousparts in the manner hereinafter described and particularly pointed Referringto the drawings, Fig. 1 is a side elevational view of a tandem disk harrow showing my improved draft connection emapplication of Cameron H. Gemberling on a plemental draft members 11. A .50

bodied therein, and

' Fig. 2 is a top plan view of the same.

In illustrating one form of my invention I have shown the same in connection with a draft actuated tandem disk harrow of the construction described and claimed in the harrow hitch, Serial Number 285,180, filed June 13, 1928'.

This harrow comprises a main draft member indicated by the reference character 10 a bar 13 which has its outer ends as shown at 14 adjustably secured to the converging sup- Pivoted at the rearend of the supplemental draft members 11 as shown at 15 are two forward disk gang 1 frames generally indicated by the reference by the reference character 17. These two gangs 17 form the front rank of the tandem disk harrow. Pivotally connected as shown at 18 to the rear end of the main draft member 10, is a rearwardly extending draft link 19 to the rear end of which as shown at 20 are pivoted two rear gang frames generally indicated by the reference characters 21. These rear gang frames are provided with the usual disk gangs generally indicated by the reference characters 22. The outer ends of these gang frames are connected by adjustable links 23 which in turn have their forward ends as shown at 24 pivoted to the inner sides and rear portions of the front gang frame16 by means of brackets 25. In the operation of angling the gangs from the parallel position. shown in Fig. 1 to their working angle, it will, of course, be understood that the inner ends of the front disk gang 17, swing rearwardly about their pivots 15 on the supplemental draft members 11 and through the link connections 23 swing the outer ends of, the rear disk gangs 22 -rearpivot 20 on the bentupwardly as shown at 28 and extend above the forward portion of the main draft .member 10 and have their forward ends as shown at 29 pivoted to levers 30. The levers 30 in turn, are pivoted as shown at 31 to the opposite sides of a U shaped bracket 32 secured to the forward end of the main draft member 10; Mounted between the relatively movable draft bars 27 and secured thereto in any well known manner, is a yoke member 33 in which is pivoted a lever 34 which may be operatively controlled by means of a rope from the operators seat on the tractor. This lever is'provided with av pawl for engaging a rack for locking the disk gangs in various angular relation with respect to each other and in the manner Specifically described and claimed in the co-pendingapplication-'pre- I substantially parallel relation Withrespect Thisconstruction comprises a relatively movto themain draft member of the tractor s'o that-in the operation of backingthetractor, and straightening the-gangs,the p'ossibility 1 of buckling up the connection between "the,

tractor and the harrow is entirely eliminated;

abledraft clevis 36 which is provided with a forward-bifurcated portion-3'l whichis=adapt ed-to'i'leceivethe draft bar of thetractor. The

:forWard'end -of this bifurcated portion'is a p- 7 'ertured so asto receivea securing'zpin38: The

clevis-"36 is provided with a rearwardly 'ex- I tendinganm89, to the intermediate portion :of which," as showniat' 40, is "pivotedth'e/lower -ends ofthe levers 30. The draft clevis is nor- -mally' heldin 1 parallel relation with respect to the i-mai-n draft member -by means of links 411' which :have their upper ends thereof as shown "ati42 pivoted'to-the opposite' s'ides of 'a Uv-shaped bracket 43 which initurn, is

' secured to the-' topgs'ide ofthemain draft member 10 in -spacedflrelation with respecttothe I first bracket 82. Thelowe'rfends' :of the links 411 are pivoted as showniatti withx'the rear "end 39iof the'draft c'levis 36; r I I 7' In theope'ration of-the abovei construction,

it'will beireadil y seen thatby having thefllinks -41 epivoted to themain' dra ftmember '10 so ;-as' 'rto'fomn imefi'ect, a parallel' linkarrangement in co operation with th'e lower portion of the (levers-130 that -:the: *clra ft clevis' 36 moves in substantial parallelism with the main] draft ."member l0faind thaton'f a rearward movement "of thetractdr with .re'spectrto. the harijow'ifor straighteningthe =disk gangs fromrtheir nertion that the possibility of buckling the rmovement=has been reduceditoaminimiim. I

v I 'While. in the above specification, I have j tion may assnme-inpractice, it will, of course,

described one embodiment which. my inven,

be understood that the same is'capable. of

modification and. that modification may be" "made Without-departing from the spirit and scope of-my invention as expressed infthe -fol-.

' lowing claims;

.What I' claim as m i ti desire fi l'e byLette'rsP'atent is-z I 1:. In combination with-'adisk harroW, of a frame therefor, disk gangs pivoted to said frame, relatively fixed longitudinallyextend- .ii1, draft members formingga,partfofwsaid frame,- relatively movable and longitudinally extending draft. z-inembers {connected to I the free ends of said-.;gangs,1-a;leverpivotedto said 'fiXed draft members and having one 'end connected to the other ends of said movable draft members,a draft 'clevis pivotally connected to the other end of said lever and a link'having one .end pivoted to said relatively fiXed dra-ft member and the other end pivoted to said'drafticlevkisi for maintaining saidclevis in its movelnent in parallel relation with respect to said relatively fixed draft ".:,\:m;, 2. In-c'o bination'with a disk harr0w, of a. frame. therefor, disk gangs pivoted to said frame, relatively fixed and longitudinally extendingzdraftmembers forming part of, said frame, relatively movable and longitudinally extending "draft members ctmnected' to 1 the free 'ends of saidxg'angs, a lever pivotedinterme'diate its ends 1 to" the forward end: "of said fixed draft members, one "end of said le'verbeingconnectiadltothe for-Ward ends of and the other, end thereof pivoted-to said draft clev-is forformingfa parallelogram construction so that saiclclevis moves in parallel relation 'w-ith respect -to said: relatively fixed draft members.

a frame ='tl1ere-for, tandem disk gangs piv0tally connected with; said frame, ,a relatively fixed-"i. and longitudinally "extending. draft member forming "a part of said frame,=-relatively' movableand longitudinally extending draft members connectedto-gthe-free end Tof: certain of said gangs,;-a lever :pivotefd' intermediate its ends to therfixeddraftzmember andhavingits upper endpiv'otally connected to said movable draft members, a draftclevis pivoted intermediate its ends -to thelower *end of 1 said "lever and: alink pivoted to s'aid "fixed draft inemberand spaced from the :pivot -0f'. said: lever, thelower 'end; of "said li'nkbeing pivotally' connected? to: the: rear end-oft said draft clevis for maintaining: saidec'levis in parallel relation'in its movement lwitli respect toy-said 7 fixed draftmember.

Y 41 In combination. with a disk harrow, of a frame therefon-tan'demdisk gangs: pivoted to said frame, a relatively fixed longitudinal "main draft member forming a :part' pofz'said frame relatively movable and longitudinallyv extending draft members connected- It'o": the vfree endof the front gangs, levers "pivotedfi', intermediate their ends to a the forward: end of 7' and onthe opposite sides of said fixed draft member, thefl-up'per end ofsaid levers being pivotally'connected tothe said forward ends of saidm'ovable draft memb'ers,;a:d-raft;, clevis pivotedxbetween'and -togthe lower ends 'of sa'id' levers and" links having; their upper -e'nds pivotedzto and on the; opposite sides :of said relatively ,fixed draft member and h avingntheir lower .endsipivotally connected .In a combination with "a disk-anew, of

to the rear end and on the opposite sides of said clevis for maintaining said clevis in parallel relation in its movement With respect to said fixed draft member.

5. The combination With a disk harrow comprising a frame, of disk gangs pivoted to said frame, relatively movable draft bars mounted on said frame and having their rear ends connected to said gangs, a parallel structure pivoted to said frame and operatively connected with said movable draft member, and a draft clevis pivotally connected to said parallel structure whereby said draft clevis moves in parallelism with respect to said frame.

In testimony whereof I have signed my name to this specification, on this 19th day of March, A. D. 1929.

WVILLIAM D. DEWEND. 

